feat(tray): 拦截托盘图标的 unmap/destroy 事件并移除图标

src/backend/x11/event.c

@@ -205,6 +205,8 @@ static bool handle_unmap_notify(
   event_t *event,
   const xcb_unmap_notify_event_t *xcb_event
 ) {
+  if (tray_handle_unmap_notify(backend, xcb_event)) return false;
+
   event->type = ZDWM_EVENT_WINDOW_REMOVE;
   event->as.window_remove.window = xcb_event->window;
   if (XCB_EVENT_SENT(xcb_event)) {
@@ -221,6 +223,8 @@ static bool handle_destroy_notify(
   event_t *event,
   const xcb_destroy_notify_event_t *xcb_event
 ) {
+  if (tray_handle_destroy_notify(backend, xcb_event)) return false;
+
   event->type = ZDWM_EVENT_WINDOW_REMOVE;
   event->as.window_remove.window = xcb_event->window;
   event->as.window_remove.reason = ZDWM_WINDOW_REMOVE_DESTROY;

src/backend/x11/tray.c

@@ -62,6 +62,14 @@ static tray_host_t *get_tray_host(void *handle) {
   return tray;
 }
 
+static size_t tray_find_icon(tray_host_t *tray, xcb_window_t window) {
+  for (size_t i = 0; i < tray->icon_count; ++i) {
+    if (tray->icons[i].window == window) return i;
+  }
+
+  return SIZE_MAX;
+}
+
 static tray_icon_t *tray_get_icon(tray_host_t *tray, xcb_window_t window) {
   for (size_t i = 0; i < tray->icon_count; ++i) {
     auto icon = &tray->icons[i];
@@ -92,6 +100,21 @@ static void tray_release_icon_window(backend_t *backend, tray_icon_t *icon) {
   xcb_reparent_window(conn, window, root, 0, 0);
 }
 
+static void tray_remove_icon_by_index(
+  backend_t *backend,
+  size_t index,
+  bool release_window
+) {
+  auto tray = backend->tray;
+  if (index >= tray->icon_count) return;
+
+  auto icon = &tray->icons[index];
+  if (release_window) tray_release_icon_window(backend, icon);
+
+  array_erase(tray->icons, tray->icon_count, index);
+  tray_dispatch_callback(tray);
+}
+
 static zdwm_size_t tray_get_icon_size(tray_host_t *tray, size_t index) {
   auto target_size = MAX(tray->icon_size, (int32_t)1);
   auto natural_width = tray->icons[index].natural_width;
@@ -548,3 +571,36 @@ bool tray_handle_property_notify(
   if (ev->window == tray->container) return true;
   return tray_get_icon(tray, ev->window) != nullptr;
 }
+
+bool tray_handle_unmap_notify(
+  backend_t *backend,
+  const xcb_unmap_notify_event_t *ev
+) {
+  auto tray = get_tray_host(backend);
+  if (!tray || !tray->initialized) return false;
+
+  auto index = tray_find_icon(tray, ev->window);
+  if (index == SIZE_MAX) return ev->window == tray->container;
+
+  tray_remove_icon_by_index(backend, index, true);
+  return true;
+}
+
+bool tray_handle_destroy_notify(
+  backend_t *backend,
+  const xcb_destroy_notify_event_t *ev
+) {
+  auto tray = get_tray_host(backend);
+  if (!tray || !tray->initialized) return false;
+
+  if (ev->window == tray->container) {
+    tray_cleanup(backend);
+    return true;
+  }
+
+  auto index = tray_find_icon(tray, ev->window);
+  if (index == SIZE_MAX) return false;
+
+  tray_remove_icon_by_index(backend, index, false);
+  return true;
+}

src/backend/x11/tray.h

@@ -34,3 +34,11 @@ bool tray_handle_property_notify(
   backend_t *backend,
   const xcb_property_notify_event_t *ev
 );
+bool tray_handle_unmap_notify(
+  backend_t *backend,
+  const xcb_unmap_notify_event_t *ev
+);
+bool tray_handle_destroy_notify(
+  backend_t *backend,
+  const xcb_destroy_notify_event_t *ev
+);